Tomorrow in Helsinki looks
sunny, with a high of 55°
and an overnight low of 44°.
Rain is unlikely (7% chance).
Winds top out near 13 mph,
and the UV index reaches 1 (low).
Helsinki has a humid continental climate.
July is the warmest month, with average highs of 69°,
and January the coldest, when nights fall to around 22°.
August brings the most rain, on about 13 days,
while June is the sunniest, with 14.7 hours of sunshine a day.
Over a whole year it rains on roughly 144 days.
The best time to visit Helsinki is generally May to September, when these are the warmest and brightest weeks of the year. Daytime temperatures in that window sit near 64°F (18°C), with rain on about 11 days a month. For the same question asked the other way round, see where else is warm in May.
Which month is coolest in Helsinki?
January, with highs of 30°F (-1°C) and lows near 22°F (-6°C). The coldest day in the 2015-2024 record fell to -14°F (-26°C).
What should I wear in Helsinki?
It depends on the month: July runs to 69°F (20°C) while January holds at 30°F (-1°C). The full month-by-month breakdown is in the packing notes above.
When does it rain most in Helsinki?
August, at 3.3 inches (83 mm) over about 13 days. April is the driest month, at 1.8 inches (45 mm).
How hot does Helsinki get in summer?
July averages 69°F (20°C). Summers here stay temperate rather than hot.
What is the hottest month in Helsinki?
July, averaging 69°F (20°C) by day and 57°F (14°C) overnight. The hottest single day in our 2015-2024 record for this location reached 88°F (31°C).
Is there snow in Helsinki?
Yes - about 34 days a year carry measurable snowfall, concentrated November through April.
Is Helsinki humid?
Relative humidity averages 80% across the year, which reads as very humid. The most comfortable stretch falls in the drier half of the year.